EP2259156A2 - Bilderzeugungsvorrichtung und Entwicklungskartusche dafür - Google Patents

Bilderzeugungsvorrichtung und Entwicklungskartusche dafür Download PDF

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Publication number
EP2259156A2
EP2259156A2 EP10162861A EP10162861A EP2259156A2 EP 2259156 A2 EP2259156 A2 EP 2259156A2 EP 10162861 A EP10162861 A EP 10162861A EP 10162861 A EP10162861 A EP 10162861A EP 2259156 A2 EP2259156 A2 EP 2259156A2
Authority
EP
European Patent Office
Prior art keywords
coupler
driving
passive
tips
contact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10162861A
Other languages
English (en)
French (fr)
Other versions
EP2259156A3 (de
Inventor
Ji-Hoon Woo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP2259156A2 publication Critical patent/EP2259156A2/de
Publication of EP2259156A3 publication Critical patent/EP2259156A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18—Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1839—Means for handling the process cartridge in the apparatus body
    • G03G21/1857—Means for handling the process cartridge in the apparatus body for transmitting mechanical drive power to the process cartridge, drive mechanisms, gears, couplings, braking mechanisms
    • G03G21/186—Axial couplings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0151—Apparatus for electrophotographic processes for producing multicoloured copies characterised by the technical problem
    • G03G2215/0158—Colour registration

Definitions

  • the present disclosure relates generally to an image forming apparatus and a developing cartridge thereof, and, more particularly, to an image forming apparatus having an improved power transmission structure.
  • An image forming apparatus which forms an image on a print medium, may be classified broadly into an electrophotographic type, in which a series of charging - light exposure - developing with developer - transferring - fusing - cleaning processes are performed to form an image on a print medium; an inkjet type where small ink droplets are selectively ejected from nozzles onto a print medium to form an image; and a thermal transfer type where a thermal print head is used.
  • toners of yellow (Y), magenta (M), cyan (C), and black (K) are applied to the print medium in a manner overlapping with one another to form a desired colour image.
  • a colour electrophotographic type image forming apparatus may include a plurality of developing cartridges corresponding to the respective colours.
  • Each developing cartridge may include a photosensitive body on which an electrostatic latent image is formed, a developing roller which develops the electrostatic latent image with toner of the colour corresponding to the particular developing cartridge, and a supplying roller which supplies the toner to the developing roller.
  • the quality of the colour image is affected by an error in colour registration. That is, the less the error in the colour registration, the higher the quality of the colour image can be.
  • One measure of the error in the colour registration may be considered as the maximum spatial deviation of the individual dots of all four colours (Y, M, C, K) typically used to form a full colour image.
  • Many image forming apparatus include components or subunits that can be detached from and reinstalled in the main body of the image forming apparatus so that these detachable units can be repaired, replenished and/or replaced.
  • One such detachable unit that may also be a possible source of, or that may play some role in, colour registration error may be the detachable developing cartridge that houses therein the photosensitive body or bodies.
  • a detachable developing cartridge is mounted in the main body of the image forming apparatus, a passive coupler at the end of a rotating shaft of the photosensitive body and a driving coupler at the end of a driving shaft provided in the main body become engaged with each other so that the rotational driving force can be transmitted to the photosensitive body.
  • the passive coupler and the driving coupler engage in a face-to-face contact with each other to transmit the driving force.
  • the passive coupler has a plurality of first contact planes while the second coupler has a plurality of second contact planes. Corresponding ones of these contact planes come into the face-to-face contact with each other with the surface contact force acting along the direction parallel to the rotating shaft of the photosensitive body.
  • the driving shaft and the rotating shaft of the photosensitive body may be driven in the state in which they are misaligned with each other due to the fabrication and assembly tolerance, the vibration during operation, or the like.
  • a change in the contact position or even no contact may occur between the first contact planes and the second contact planes respectively of the passive coupler and the driving coupler.
  • Such misalignment in or lack of contact between the contact planes may cause the photosensitive body to rotate at a rotational speed that is not constant, but which varies in a periodic pattern, for example, as illustrated in FIGS. 1 and 2 .
  • FIG. 1 plots the results of an experiment, in which, using a conventional image forming apparatus, and for each of the colours Y, M, C and K, a line of one hundred test points or dots is printed along a lengthwise direction of a print medium, and, for each of such test points, the positional error, i.e., the deviation distance, is measured.
  • the X-axis represents the lengthwise direction of the print medium (i.e., the vertical scanning direction or the direction of travel of the print medium) while the Y-axis represents the positional error of the dots.
  • an image forming apparatus may include a main body, a driving unit and a consumable unit.
  • the driving unit may be mounted to the main body, and may comprise a driving shaft and a driving coupler connected to the driving shaft.
  • the driving coupler may have arranged thereon a plurality of driving tips.
  • the consumable unit may be detachably received in the main body, and may comprise a rotating body configured to rotate with a driven shaft and a passive coupler connected to the driven shaft.
  • the passive coupler may have arranged thereon a plurality of passive tips.
  • the corresponding ones of the plurality of driving tips and the plurality of passive tips may come into engaging contact with each other when the consumable unit is operably received in the main body.
  • the corresponding ones of the plurality of driving tips and the plurality of passive tips may maintain the engaging contact with each other when respective rotational axes of the driving shaft and the driven shaft intersect each other.
  • At least one of the driving coupler and the passive coupler may comprise a primary coupler and a secondary coupler.
  • the primary coupler may be coupled to, and may be rotatable with, the at least one of the driving shaft and the driven shaft.
  • the secondary coupler may be moveable along a direction of a rotational axis of the at least one of the driving shaft and the driven shaft toward and away from the primary coupler, and may be in one or more point-contacts with the primary coupler with respect to a rotational direction of the at least one of the driving shaft and the driven shaft.
  • an image forming apparatus may be provided to include a main body, a driving unit and a consumable unit.
  • the driving unit may be mounted to the main body, and may comprise a driving shaft and a driving coupler connected to the driving shaft.
  • the driving coupler may have arranged thereon a plurality of driving tips.
  • the consumable unit may be detachably received in the main body, and may comprise a rotating body configured to rotate with a driven shaft and a passive coupler connected to the driven shaft.
  • the passive coupler may have arranged thereon a plurality of passive tips. The corresponding ones of the plurality of driving tips and the plurality of passive tips may be in a point-contact with each other with respect to a rotational direction of at least one of the driving shaft and the drive shaft.
  • the passive coupler may be connected to at least one of respective rotating shafts of the image carrying body and the developing roller, and may have arranged thereon a plurality of passive tips.
  • the plurality of passive tips may be arranged such that each of the plurality of passive tips comes into an engaging contact with a respective corresponding one of the plurality of driving tips of the driving coupler of the image forming apparatus when the developing cartridge is operably received in the main body of the image forming apparatus.
  • the corresponding ones of the plurality of driving tips and the plurality of passive tips may maintain the engaging contact with each other when respective rotational axes of the driving shaft and the driven shaft intersect each other.
  • Each of the one or more projections may make a point contact with a surface of the respective corresponding one of the one or more grooves into which it is received.
  • Each of the one or more projections may be movable about the point contact within the respective corresponding one of the one or more grooves into which it is received such that the primary driving coupler has a three dimensional degree of freedom of movement with respect to the secondary driving coupler.
  • Each of the plurality of circumferentially spaced protrusions may comprise a second inclined surface that extends away from the tip and that forms an acute angle with a second line extending from the tip to a radial center of the second coupler.
  • the developing cartridge 200 may include an image carrying body 210; a developing roller 240 (shown in FIG. 15 ) for supplying developer to the image carrying body 210 to thereby develop a latent image on the image carrying body 210; a feeding roller 230 (shown in FIG. 15 ) for supplying the developer to the developing roller 240; a storage unit (not shown) for storing therein the developer and an agitator (not shown) to stir the developer stored in the storage unit.
  • FIG. 3 For purposes of illustrative convenience, only one developing cartridge 200 is illustrated in FIG. 3 while only the driving couplers C1, C3 and C4 are illustrated in places of the other developing cartridges 200 that are not illustrated. It should be understood that the following descriptions in reference to one developing cartridge will be applicable to the other developing cartridges as well.
  • the plurality of axial projections 333 may be in line-contacts with the respective ones of the contact surface 341a of the passive coupler 340 along the radial direction of the secondary coupler 330. With such a line contact along the radial direction, the contact region for the transmission of power may vary along the line contact, and may thus not be uniform during operation.
  • the primary coupler 320 may be placed to slide over the end portion of the driving shaft 110 until the insertion projection 325a of the primary coupler 320 engages the insertion projection groove 113 of the driving shaft 110.
  • Such an improved structure of the power transmission unit 300 according to one or more embodiments of the present disclosure significantly decreases the colour registration error.
  • the maximum colour registration error observed was about 102 ⁇ m with no test point (0%) having a colour registration error of 126 ⁇ m or larger whereas, in comparison, in the case of a conventional image forming apparatus, as shown in FIG. 2 , the maximum colour registration error was about 210 ⁇ m with 41.4% of 100 test points having a colour registration error of 126 ⁇ m (corresponding to three dots for a resolution of 600 dpi) or larger. Accordingly, a significant reduction in the colour registration error can be achieved in an image forming apparatus of a configuration according to an aspect of the present disclosure,
  • the manual medium feeding unit 30 may include a pick-up roller 32 and a plurality of conveying rollers 31 and 33, and may be alternate source of print media alternate to the medium supplying unit 10.
  • a pick-up roller 32 When one or more print media are placed on the manual medium feeding unit 30, such manually placed print media may be picked up by the pick up roller 32, and may be fed by the conveying rollers 31 and 33 along the print medium feeding path toward the transfer roller 500.
  • the scan module 710 may remain stationary while scanning a document conveyed by the automatic document conveying unit 700, and may reciprocate along the guide bar 730 when scanning a document is manually placed on a platen (not shown).
  • the automatic document conveying unit 700 may include a tray 727 on which the document(s) may be placed; a pick-up roller 730 for picking up a document from the tray 727; a double-conveying preventing unit 740 for separating the picked-up documents and for allowing further advancement of one document at a time, a plurality of conveying rollers 750 for convey each sheet of document past the scan module 710 and exit rollers 760 for discharging a document that has been read.
  • the power transmission unit 300 is arranged on the path of power transmission to the image carrying body 210, it should be noted that aspects of the present disclosure is not so limited, and that the power transmission unit 300 may be employed to transmit a driving force to other rotating bodies, for which an improved uniformity in the rotational speed may be desirable.
  • the power transmission unit may provide one or more of the advantageous effects, which may include: 1) a reduction in the colour registration error; 2) an improved quality of a colour image; 3) an improved uniformity of the rotational speed of a rotating body; and 4) a transmission of rotational power that is better tolerant of some relative radial movement of the driving and driven shafts.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrophotography Configuration And Component (AREA)
EP10162861.8A 2009-05-29 2010-05-14 Bilderzeugungsvorrichtung und Entwicklungskartusche dafür Withdrawn EP2259156A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090047849A KR101667927B1 (ko) 2009-05-29 2009-05-29 화상형성장치 및 그 동력전달유닛

Publications (2)

Publication Number Publication Date
EP2259156A2 true EP2259156A2 (de) 2010-12-08
EP2259156A3 EP2259156A3 (de) 2015-07-01

Family

ID=42541580

Family Applications (1)

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EP10162861.8A Withdrawn EP2259156A3 (de) 2009-05-29 2010-05-14 Bilderzeugungsvorrichtung und Entwicklungskartusche dafür

Country Status (3)

Country Link
US (1) US8244159B2 (de)
EP (1) EP2259156A3 (de)
KR (1) KR101667927B1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2595004A3 (de) * 2011-11-18 2014-06-25 Samsung Electronics Co., Ltd Bilderzeugungsvorrichtung mit einer Leistungsübertragungsanordnung
EP2990876A1 (de) * 2014-08-27 2016-03-02 Ricoh Company, Ltd. Antriebsübertragungsvorrichtung und vorrichtung mit antriebsübertragungsvorrichtung
EP3361322A1 (de) * 2017-02-14 2018-08-15 Canon Kabushiki Kaisha Bilderzeugungsvorrichtung
CN109212940A (zh) * 2017-06-30 2019-01-15 纳思达股份有限公司 动力接收单元、旋转部件、处理盒、安装方法及拆卸方法
EP3462247A1 (de) * 2017-09-28 2019-04-03 Canon Kabushiki Kaisha Bilderzeugungsvorrichtung
WO2020185276A1 (en) 2019-03-11 2020-09-17 Hewlett-Packard Development Company, L.P. Driving coupler having locking structure and power transmission structure
RU2758980C1 (ru) * 2014-11-28 2021-11-03 Кэнон Кабусики Кайся Картридж и электрофотографическое устройство формирования изображения

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JP5649328B2 (ja) * 2010-05-10 2015-01-07 キヤノン株式会社 画像形成装置
JP5542741B2 (ja) * 2010-11-30 2014-07-09 京セラドキュメントソリューションズ株式会社 トナー供給装置及びトナー収納容器
US8628269B2 (en) 2011-09-02 2014-01-14 Roy Fan Rotating drive shaft coupling
KR101842614B1 (ko) * 2011-11-21 2018-03-27 에스프린팅솔루션 주식회사 멀티패스방식 화상형성장치
JP5928887B2 (ja) * 2012-05-30 2016-06-01 富士ゼロックス株式会社 構造体及び画像形成装置
KR20140065596A (ko) * 2012-11-16 2014-05-30 삼성전자주식회사 동력 전달장치 및 이를 채용한 화상형성장치
JP6242201B2 (ja) * 2012-12-14 2017-12-06 キヤノン株式会社 プロセスカートリッジ及び画像形成装置
US9696684B2 (en) 2012-12-14 2017-07-04 Canon Kabushiki Kaisha Process cartridge and image forming apparatus
JP6256793B2 (ja) * 2013-08-13 2018-01-10 株式会社リコー 駆動力伝達装置及び画像形成装置
KR20150027889A (ko) * 2013-08-30 2015-03-13 삼성전자주식회사 화상 형성 장치
JP6376749B2 (ja) * 2013-12-06 2018-08-22 キヤノン株式会社 プロセスカートリッジおよび電子写真画像形成装置
JP6541340B2 (ja) * 2014-12-03 2019-07-10 キヤノン株式会社 画像形成装置
JP6493803B2 (ja) * 2015-07-10 2019-04-03 株式会社リコー 駆動伝達装置および画像形成装置
CN105404124A (zh) * 2015-12-21 2016-03-16 深圳市科洛德打印耗材有限公司 一种感光鼓驱动组件及包含该感光鼓驱动组件的硒鼓
JP6789656B2 (ja) * 2016-04-06 2020-11-25 キヤノン株式会社 駆動伝達装置及び画像形成装置
US11150592B2 (en) * 2017-01-24 2021-10-19 Canon Kabushiki Kaisha Drive transmission device and image forming apparatus
CN116184780A (zh) * 2017-12-13 2023-05-30 佳能株式会社 盒与图像形成装置
KR20190140649A (ko) * 2018-06-12 2019-12-20 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. 픽업롤러 구동을 위한 화상형성장치
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US8855534B2 (en) 2011-11-18 2014-10-07 Samsung Electronics Co., Ltd. Image forming apparatus and power-transmission assembly of the same
EP2595004A3 (de) * 2011-11-18 2014-06-25 Samsung Electronics Co., Ltd Bilderzeugungsvorrichtung mit einer Leistungsübertragungsanordnung
EP2990876A1 (de) * 2014-08-27 2016-03-02 Ricoh Company, Ltd. Antriebsübertragungsvorrichtung und vorrichtung mit antriebsübertragungsvorrichtung
US10248071B2 (en) 2014-08-27 2019-04-02 Ricoh Company, Ltd. Drive transmitter and image forming apparatus incorporating the drive transmitter
RU2758980C1 (ru) * 2014-11-28 2021-11-03 Кэнон Кабусики Кайся Картридж и электрофотографическое устройство формирования изображения
US11960239B2 (en) 2014-11-28 2024-04-16 Canon Kabushiki Kaisha Cartridge and electrophotographic image forming apparatus
US11662687B2 (en) 2014-11-28 2023-05-30 Canon Kabushiki Kaisha Cartridge and electrophotographic image forming apparatus
US11353822B2 (en) 2014-11-28 2022-06-07 Canon Kabushiki Kaisha Cartridge and electrophotographic image forming apparatus
EP3361322A1 (de) * 2017-02-14 2018-08-15 Canon Kabushiki Kaisha Bilderzeugungsvorrichtung
US10444701B2 (en) 2017-02-14 2019-10-15 Canon Kabushiki Kaisha Image forming apparatus
US11513469B2 (en) 2017-06-30 2022-11-29 Ninestar Corporation Power receiving unit and process cartridge
CN109212940B (zh) * 2017-06-30 2023-08-11 珠海纳思达信息技术有限公司 动力接收单元、旋转部件、处理盒、安装方法及拆卸方法
US11022937B2 (en) 2017-06-30 2021-06-01 Ninestar Corporation Power receiving unit, rotating component, process cartridge, and assembly and disassembly methods thereof
CN109212940A (zh) * 2017-06-30 2019-01-15 纳思达股份有限公司 动力接收单元、旋转部件、处理盒、安装方法及拆卸方法
EP3614213A4 (de) * 2017-06-30 2020-09-09 Ninestar Corporation Leistungsaufnahmeeinheit, drehkomponente, verarbeitungskartusche, montageverfahren und demontageverfahren
JP2022003414A (ja) * 2017-06-30 2022-01-11 納思達股▲ふん▼有限公司 動力受けユニット、回転部材、プロセスカートリッジ、装着方法及び取外方法
JP2020518865A (ja) * 2017-06-30 2020-06-25 納思達股▲ふん▼有限公司 動力受けユニット、回転部材、プロセスカートリッジ、装着方法及び取外方法
US11853003B2 (en) 2017-06-30 2023-12-26 Ninestar Corporation Power receiving unit, rotating component, process cartridge, and assembly and disassembly methods thereof
EP3462247A1 (de) * 2017-09-28 2019-04-03 Canon Kabushiki Kaisha Bilderzeugungsvorrichtung
US10571858B2 (en) 2017-09-28 2020-02-25 Canon Kabushiki Kaisha Image forming apparatus and configuration of cartridge unit
US11614708B2 (en) 2019-03-11 2023-03-28 Hewlett-Packard Development Company, L.P. Driving coupler having locking structure and power transmission structure
WO2020185276A1 (en) 2019-03-11 2020-09-17 Hewlett-Packard Development Company, L.P. Driving coupler having locking structure and power transmission structure
EP3906443A4 (de) * 2019-03-11 2022-09-14 Hewlett-Packard Development Company, L.P. Antriebskoppler mit verriegelungsstruktur und leistungsübertragungsstruktur
US11921456B2 (en) 2019-03-11 2024-03-05 Hewlett-Packard Development Company, L.P. Driving coupler having locking structure and power transmission structure
CN113574461A (zh) * 2019-03-11 2021-10-29 惠普发展公司，有限责任合伙企业 具有锁定结构和动力传递结构的驱动联接件

Also Published As

Publication number Publication date
KR20100129085A (ko) 2010-12-08
KR101667927B1 (ko) 2016-10-20
US20100303503A1 (en) 2010-12-02
US8244159B2 (en) 2012-08-14
EP2259156A3 (de) 2015-07-01

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